Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1988 Mercedes Benz 560SLFACTORY OEM SERVICE PROCEDURE
Vacuum Control Valve
- Connect vacuum tester to vacuum control valve and check vacuum at idle (9.6-11 in. Hg). With engine stopped and throttle linkage at full throttle stop, vacuum should be zero in. Hg. If test is okay, test complete. If test is not okay, go to next step.
- Test vacuum lines and check vacuum pump. Adjust vacuum control valve and replace, if necessary.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.